Merge 118039 - Source/WebCore: Fix iframe printing.

Source/WebCore/page/Frame.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Simon Hausmann <hausmann@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  *                     2001 George Staikos <staikos@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2005 Alexey Proskuryakov <ap@nypop.com>
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 504 matching lines @@
 void Frame::setPrinting(bool printing, const FloatSize& pageSize, const FloatSize& originalPageSize, float maximumShrinkRatio, AdjustViewSizeOrNot shouldAdjustViewSize)
 {
     // In setting printing, we should not validate resources already cached for the document.
     // See https://bugs.webkit.org/show_bug.cgi?id=43704
     ResourceCacheValidationSuppressor validationSuppressor(m_doc->cachedResourceLoader());
 
     m_doc->setPrinting(printing);
     view()->adjustMediaTypeForPrinting(printing);
 
     m_doc->styleResolverChanged(RecalcStyleImmediately);
-    if (printing)
+    if (printing && !tree()->parent()) {
+        // Only root frame should be fit to page size. Subframes should be constrained by parents only.
         view()->forceLayoutForPagination(pageSize, originalPageSize, maximumShrinkRatio, shouldAdjustViewSize);
-    else {
+    } else {
         view()->forceLayout();
         if (shouldAdjustViewSize == AdjustViewSize)
             view()->adjustViewSize();
     }
 
     // Subframes of the one we're printing don't lay out to the page size.
     for (Frame* child = tree()->firstChild(); child; child = child->tree()->nextSibling())
         child->setPrinting(printing, FloatSize(), FloatSize(), 0, shouldAdjustViewSize);
 }
 
 FloatSize Frame::resizePageRectsKeepingRatio(const FloatSize& originalSize, const FloatSize& expectedSize)
 {
     FloatSize resultSize;
     if (!contentRenderer())
         return FloatSize();
 
     if (contentRenderer()->style()->isHorizontalWritingMode()) {
+        ASSERT(fabs(originalSize.width()) > numeric_limits<float>::epsilon());
         float ratio = originalSize.height() / originalSize.width();
         resultSize.setWidth(floorf(expectedSize.width()));
         resultSize.setHeight(floorf(resultSize.width() * ratio));
     } else {
+        ASSERT(fabs(originalSize.height()) > numeric_limits<float>::epsilon());
         float ratio = originalSize.width() / originalSize.height();
         resultSize.setHeight(floorf(expectedSize.height()));
         resultSize.setWidth(floorf(resultSize.height() * ratio));
     }
     return resultSize;
 }
 
 void Frame::injectUserScripts(UserScriptInjectionTime injectionTime)
 {
     if (!m_page)
@@ skipping 554 matching lines @@
 
     m_view->paintContents(buffer->context(), paintingRect);
 
     RefPtr<Image> image = buffer->copyImage();
     return createDragImageFromImage(image.get());
 }
 
 #endif
 
 } // namespace WebCore